Earlier quoted context omitted.
Did you try training Siri? (Enable siri text) and then tap it when it says this app not found, and change "offy" to "Authie". After a few times, it should recognize your prompt
I'm not sure what setting that is. I've tried hitting the "tap to edit" thingy to edit the command it head from "open Offie" to "open Authy" several times, and it doesn't seem to really help much. It's not that much of a problem on my phone or iPad, because I can just ask it to open Authenticator (Microsoft's authentication app). When I set up TOTP for a site, I scan the QR code in both. It's on my Apple Watch that i…
I’d try to do it each time, hopefully won’t take too long to get it.
(On iOS 14, enable Siri - Siri Responses - Always show speech. On previous iOS, Siri is full screen and I think tap to edit is always available.)
Not sure about watch. However, I assume it should sync if you enable Siri to sync in iCloud. Settings - your name icon - iCloud - toggle Siri.